Inking-roller-driving mechanism



J. wHlTE.v

INKING ROLLER DRIVING NIECHANISNI.

APPLICATION FILED JUNE 3| 1919. 1,341,692. Patentedlune 1, 1920.

UNITED STATES PATENT oFF-ICE.

JOSEPH WHITE, OE PISCATAWAY TOWNSHIP, NEW IEEsEY, AssIGNoE To HALL PEINT- ING PEEss COMPANY, OE DUNELLEN, NEW JERSEY, A CORPORATION OE NEW JERSEY.

INKING-EOLIJER-DEIVING MEcHANI'sM.

Appiication filed :rane 3, 1919.

To all whom t may concern: Y

Be it known that I, JOSEPH VHITE, a citizen of the United States, residing at Piscataway township, State of New Jersey, post-oice address Boundbrook, New Jersey, have invented certain new and useful Improvements in Inking-ROller-Driving Mechanisms; and I do declare the following to be a full, true, and exact description of said invention, such as will enablel others skilled in the art to which it appertains to make and use the same.

This invention relates to inking lmechanisms for printing 'presses and particularly to a driving device for some of the rollers bywhich the surface speed of such rollers when in contact with the printing surface will be precisely the same so that all possibility of gear streaks is eliminated. With this and other objects in view, my invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and pointed out in the appended claims.

In the drawings, Figure 1 represents a side elevation of a portion of an inking arrangement embodying an illustrative form of my invention.

Fi' 2 is aside elevation of Fig. 1 showing t e arrangement of one end only of the inking arrangement.

The corresponding parts are. referred to both in the specification and in the drawings by similar reference characters.

For purposes of illustration, I have adopted an Aarrangement of rollers common in many forms of presses, particularly those of the planographic type, in which 10 is 'a portion of a form 'cylinder carrying the usual planographic printing plate, and 11 and 12 are the usual formrollers supported in sockets 13, 14 so as to contact with the printing surface. These rollers are nonmetallic and may be either leather or composition, according to the kind of printing to be accomplished.

15 is a metallic inking roller contacting with the rollers 11 and 12 and supported in the side frame of the machine which also supports the sockets 13 and 14. 16 represents a portion of the neXt roller of the inking train, it being understood that the ink to be supplied to the form rollers 11 and 12 will be received from the usual ink Specification of Letters `Iratent.

Patented J une 1, 1920. serial No. 301,492.

gearing consisting of a gear 15.1 fastened' tO roller 15 and an intermediate gear 152 meshing with a gear on the cylinder 10. In such usual constructions, rollers 11 and 12 are driven only by frictionalv contact of their body portions with theprinting surface and roller 15.

In some cases, I have found that driving these rollers by frictionalcontact with their body portions only produces what are known as gear streaks, that is, the ink is not laid uniformly on the printing surface, but is piled up in streaks. I have found that,

' in some cases at least, these gear streaks result from the method byV which the form rollers are driven and my present device is 'directed to driving such rollers so that vthere will be no lost motion between them and the printing surface to produce streaks of ink.

I accomplish this result by providing a gearing to drive the form roller directly v from the form cylinder, but with slipping connections between the drive and the form roller so that the roller is subjected bythe drive to a slight torque which is -in'suiiicient alone to drive it. By this means, the inertia of the roller 'is practically overcome so that the frictional contact of the body portion with the printing surface and distributer roller has relatively little work to do in turning the form roller constantly at the same surface speed as that of the printing surface.

In the illustrative embodiment of my in- Vention, 17 is a gear connected to the printing cylinder and 18 is a pinion meshing with gear 17. The pinion 18 is mounted so -tween the band and the hub 19.

It will-be seen that as the pinion 18 is rotated by the gear 17 power will be transmitted to the shank 2() through the friction band which may be adjusted so as to be insufficient in itself to rotate the roller 12, but yet sufficient to relieve the contact with the printing plate of Work so that such contact will always keep the roller 12 turning at exactly the same surface speed as the printing plate on cylinder 10.

In the form illustrated, roller 15 is also positively driven, but it will be understood that such driving may or may not be supplied. Similarly, only one of the two form rollers is shown as provided with my frictional driving arrangement, but it will be understood that both may be so supplied, if desired. Such an arrangement is particularly desirable where the form roller must be held up against gravity so as to contact with the distributer roller, as in the i case with the roller 12 as illustrated.

It will be understood that since form rollers 11 and 12 are non-metallic, they decrease in size through wear and consequently it is not possible to provide a fixed gear drive for such rollers. It will be understood that my arrangement permits such .-a drive on rollers of this character however, v:and the gear 17 and pinion 18 are so cut f might become a rack.

It will also be understood that my invention may be applied to any fiuid applyl ing roller in which it is desired that the surface of the fluid applying roller shall move precisely at the same speed continuously as the surface to which the fluid is being applied and thatconsequently the specific arrangement 0f rollers shown in the drawingsv tributer and said surface, a driving gear moving with said surface, a driven gear mounted on the end of said inking roller and independent thereof and frictional connections between said driven gear and lsaid roller.

3. A moving surface, a metallic distributer spaced from said surface, a non-metallic inking roller in contact with said distributer and said surface, a driving gear moving with said surface, a driven gear mounted on the end of said inking roller and independent thereof and adjustable frictional connections between said driven gear and said roller.

4. A moving printing surface, a form roller in contact therewith, a positively driven roller contacting with said form roller, gearing to drive said positively driven roller at a surface speed equal to that of the printing surface, and a supplemental friction drive for said form roller including a pair of friction members, comprising a friction band and a friction hub, one of said members being connected to said gear and the other of said members being'connected to said roller and means to vary the frictional contact between said band and said hub.

JOSEPH VHITE. 

